Standard Water Melting and Boiling Temperatures and Enthalpies of the Transitions

Temperature (K)

ΔH (kJ/mol)

melting

273.15

6.088

boiling

373.15

40.656 (44.016 at 298 K)

Water Cryoscopic (Freezing Point Depression) and Ebullioscopic (Boiling Point Elevation) Constants

Kf = 1.86°C∙kg∙mol−1 (cryoscopic constant)

Kb = 0.51°C∙kg∙mol−1 (ebullioscopic constant)

Figure 1. Water full-range spectral absorption curve. This curve shows the full-range spectral absorption for water. The y-axis signifies the absorption in 1/cm. If we divide 1 by this value, we will obtain the length of the path (in cm) after which the intensity of a light beam passing through water decays by a factor of the base of the natural logarithm e (e = 2.718281828).